Penetran

"Penetran has a unique, patented formula which provides pain sufferers with fast acting, soothing relief which works differently than any other products available. Instead of distracting from the pain with hot or cold sensations, Penetran's quarternary ammonium active ingredient formula has a neutralizing effect on the pain signals to the brain. Doctor-recommended for arthritis, tendinitis, bursitis, work or sports aches and pains, minor bruises, bites and burns."